X=int(input())
if 30<=X<=40:
    print('Yes')
else:
    print('No') X=int(input()) X int(input()) int input() input if 30<=X<=40:
    print('Yes')
else:
    print('No') 30<=X<=40 30<=X 30 X 40 print('Yes') print 'Yes' print('No') print 'No' X=int(input()) int(input()) X
X=int(input())
if 30<=X<=40:
    print('Yes')
else:
    print('No')